CN214120492U - LNG cold energy comprehensive utilization system - Google Patents
LNG cold energy comprehensive utilization system Download PDFInfo
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- CN214120492U CN214120492U CN202120029015.6U CN202120029015U CN214120492U CN 214120492 U CN214120492 U CN 214120492U CN 202120029015 U CN202120029015 U CN 202120029015U CN 214120492 U CN214120492 U CN 214120492U
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- pipeline
- lng
- outlet
- inlet
- secondary refrigerant
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- 239000003949 liquefied natural gas Substances 0.000 claims abstract description 68
- 239000003507 refrigerant Substances 0.000 claims abstract description 46
- 239000013535 sea water Substances 0.000 claims abstract description 46
- 230000008016 vaporization Effects 0.000 claims abstract description 29
- 238000009834 vaporization Methods 0.000 claims abstract description 29
- 238000010612 desalination reaction Methods 0.000 claims abstract description 23
- 238000005057 refrigeration Methods 0.000 claims abstract description 15
- 239000013505 freshwater Substances 0.000 claims abstract description 13
- 239000002699 waste material Substances 0.000 abstract description 5
- 230000002950 deficient Effects 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical group C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
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- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The utility model provides a LNG cold energy comprehensive utilization system, a serial communication port, include: the system comprises an LNG (liquefied natural gas) conveying pipeline (1), a BOG conveying pipeline (2), a secondary refrigerant circulating pump (3), an economizer (4), a refrigeration house (5), a secondary refrigerant inlet pipeline (6), a secondary refrigerant outlet pipeline (7), an evaporator (8), a seawater desalination device (9), a seawater inlet pipeline (10), a fresh water outlet pipeline (11), a refrigerator (12) and an LNG vaporization condenser (13). This application effectively combines a large amount of cold energies that LNG vaporization produced with freezer, sea water desalination device, retrieves unnecessary cold energy and carries out the sea water desalination when maintaining the freezer function, has both reduced the freezer energy consumption by a wide margin and has alleviateed the pressure that fresh water resources is deficient again, has realized resource make full use of, has reduced the waste of resource.
Description
Technical Field
The utility model belongs to the technical field of the cold energy utilizes, concretely relates to LNG cold energy comprehensive utilization system.
Background
The amplification of the Chinese LNG receiving station is rapid, for example, a 300 ten thousand tons/year LNG receiving station, the cold energy released by the continuous and uniform gasification of LNG is about 80MW, and the direct discharge causes huge energy waste.
LNG (liquefied natural gas) is recognized as the cleanest fossil energy source on earth, and its main component is methane. LNG is generally stored in a cryogenic storage tank at about-162 ℃ and 0.1MPa during transportation, and LNG stores a large amount of cold energy (about 230 kWh/ton of cold energy available).
Most LNG receiving stations in China are built in coastal areas, marine fishery resources are developed (represented by Zhoushan islands), the refrigerating capacity of a refrigeration house is extremely high, and the power consumption is huge, so that the energy waste can be reduced by using LNG cold energy of the LNG receiving stations as a cold source, and the power load is reduced.
SUMMERY OF THE UTILITY MODEL
The defect to prior art existence, the utility model provides a LNG cold energy comprehensive utilization system can effectively solve above-mentioned problem.
The utility model adopts the technical scheme as follows:
the utility model provides a LNG cold energy comprehensive utilization system, include: the system comprises an LNG (liquefied natural gas) conveying pipeline (1), a BOG conveying pipeline (2), a secondary refrigerant circulating pump (3), an economizer (4), a refrigeration house (5), a secondary refrigerant inlet pipeline (6), a secondary refrigerant outlet pipeline (7), an evaporator (8), a seawater desalter (9), a seawater inlet pipeline (10), a fresh water outlet pipeline (11), a refrigerator (12) and an LNG vaporization condenser (13);
a cold source inlet of the LNG vaporization condenser (13) is connected with the LNG conveying pipeline (1), a cold source outlet of the LNG vaporization condenser (13) is connected with the BOG conveying pipeline (2), a heat source inlet of the LNG vaporization condenser (13) is connected with a lower end outlet of the refrigerator (12), and a heat source outlet of the LNG vaporization condenser (13) is connected with an inlet of the secondary refrigerant circulating pump (3);
the outlet of the refrigerating medium circulating pump (3) is connected to the inlet of the economizer (4), the lower outlet of the economizer (4) is connected to the cold source inlet of the evaporator (8), and the cold source outlet of the evaporator (8) is connected to the refrigerating medium inlet of the refrigerator (12);
the secondary refrigerant inlet pipeline (6) is arranged in the refrigeration house (5), the outlet end of the secondary refrigerant inlet pipeline (6) is connected to the heat source inlet of the evaporator (8), the heat source outlet of the evaporator (8) is connected with the inlet of the secondary refrigerant outlet pipeline (7), and the outlet of the secondary refrigerant outlet pipeline (7) is connected into the refrigeration house (5);
a cold source inlet of the seawater desalter (9) is connected to the upper left end of the refrigerator (12), a heat source inlet of the seawater desalter (9) is connected with the seawater inlet pipeline (10), a cold source outlet of the seawater desalter (9) is connected to the lower left end of the refrigerator (12), and a heat source outlet of the seawater desalter (9) is connected with the fresh water outlet pipeline (11).
Preferably, the seawater desalination device (9) is a WR freezing type seawater desalination device.
The utility model provides a LNG cold energy comprehensive utilization system has following advantage:
this application effectively combines a large amount of cold energies that LNG vaporization produced with freezer, sea water desalination device, retrieves unnecessary cold energy and carries out the sea water desalination when maintaining the freezer function, has both reduced the freezer energy consumption by a wide margin and has alleviateed the pressure that fresh water resources is deficient again, has realized resource make full use of, has reduced the waste of resource.
Drawings
Fig. 1 is the utility model provides a LNG cold energy comprehensive utilization system's schematic structure diagram.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to further explain the present invention in detail. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
This application effectively combines a large amount of cold energy that LNG vaporization produced with freezer, sea water desalination device, retrieves unnecessary cold energy and carries out the sea water desalination when maintaining the freezer function, has both reduced the freezer energy consumption by a wide margin and has alleviateed the pressure that fresh water resources are deficient again.
Specifically, this application is with LNG as the cold source, cools down the freezer, maintains freezer low temperature operation, is used for sea water desalination's cold source with residual cold energy simultaneously. Referring to fig. 1, the LNG cold energy comprehensive utilization system includes: the system comprises an LNG (liquefied natural gas) conveying pipeline 1, a BOG conveying pipeline 2, a secondary refrigerant circulating pump 3, an economizer 4, a refrigeration house 5, a secondary refrigerant inlet pipeline 6, a secondary refrigerant outlet pipeline 7, an evaporator 8, a seawater desalination device 9, a seawater inlet pipeline 10, a fresh water outlet pipeline 11, a refrigerator 12 and an LNG vaporization condenser 13;
a cold source inlet of the LNG vaporization condenser 13 is connected with the LNG conveying pipeline 1, a cold source outlet of the LNG vaporization condenser 13 is connected with the BOG conveying pipeline 2, a heat source inlet of the LNG vaporization condenser 13 is connected with a lower end outlet of the refrigerator 12, and a heat source outlet of the LNG vaporization condenser 13 is connected with an inlet of the secondary refrigerant circulating pump 3;
the outlet of the refrigerating medium circulating pump 3 is connected to the inlet of the economizer 4, the outlet at the lower end of the economizer 4 is connected to the cold source inlet of the evaporator 8, and the cold source outlet of the evaporator 8 is connected to the refrigerating medium inlet of the refrigerator 12;
a secondary refrigerant inlet pipeline 6 is arranged in the refrigeration house 5, the outlet end of the secondary refrigerant inlet pipeline 6 is connected to the heat source inlet of the evaporator 8, the heat source outlet of the evaporator 8 is connected with the inlet of a secondary refrigerant outlet pipeline 7, and the outlet of the secondary refrigerant outlet pipeline 7 is connected into the refrigeration house 5;
a cold source inlet of the seawater desalter 9 is connected to the left upper end of the refrigerator 12, a heat source inlet of the seawater desalter 9 is connected with a seawater inlet pipeline 10, a cold source outlet of the seawater desalter 9 is connected to the left lower end of the refrigerator 12, and a heat source outlet of the seawater desalter 9 is connected with a fresh water outlet pipeline 11; wherein the seawater desalination device 9 is a WR freezing type seawater desalination device.
Structurally, the LNG cold energy comprehensive utilization system comprises an LNG vaporization system, a seawater desalination system, a refrigeration house system and related pipeline systems.
The LNG vaporization system comprises liquid natural gas, an LNG vaporization condenser and gaseous natural gas. The seawater desalination system comprises a seawater desalination device, a refrigerator, a secondary refrigerant circulating pump, an economizer, an evaporator, an LNG vaporization condenser, a secondary refrigerant, a seawater inlet pipeline, a fresh water outlet pipeline, a pipeline valve and a control system. The refrigeration storage system comprises an evaporator, an economizer, a secondary refrigerant inlet pipeline and a secondary refrigerant outlet pipeline.
The LNG passes through the LNG vaporization condenser and is vaporized into gaseous natural gas. The secondary refrigerant enters the evaporator through a secondary refrigerant inlet pipeline, and the secondary refrigerant cooled by the secondary refrigerant is also used as a cold source of the refrigeration house and is sent into the refrigeration house through a secondary refrigerant outlet pipeline. The seawater desalination system further utilizes the residual cold energy of the secondary refrigerant as a cold source to carry out seawater desalination treatment.
The working principle is as follows:
LNG enters the LNG vaporization condenser 13 from the LNG transfer line 1, is vaporized to raise the temperature to BOG, and is discharged from the BOG transfer line 2 to other plant components.
The liquid-state secondary refrigerant is driven by the secondary refrigerant circulating pump 3, sequentially passes through the economizer 4, the evaporator 8 and the refrigerator 12, then enters the LNG vaporization condenser 13, transfers heat to LNG, is condensed into liquid-state secondary refrigerant, and returns to the secondary refrigerant circulating pump 3 for circulation.
The secondary refrigerant entering the evaporator 8 is transmitted to the cold storage 5 through the secondary refrigerant outlet pipeline 7 after being transmitted with cold energy by the liquid secondary refrigerant, so as to achieve the purpose of cooling the cold storage, and then the temperature is increased and is discharged to the evaporator 8 from the secondary refrigerant inlet pipeline 6 to form circulation.
The residual cold energy of the secondary refrigerant is transmitted to the seawater desalination device 9 through the refrigerator 12 after coming out of the evaporator 8 to desalinate the seawater into fresh water, and finally returns to the LNG vaporization condenser 13 to be used as a heat source for LNG vaporization.
The utility model provides a LNG cold energy comprehensive utilization system has following advantage:
this application effectively combines a large amount of cold energies that LNG vaporization produced with freezer, sea water desalination device, retrieves unnecessary cold energy and carries out the sea water desalination when maintaining the freezer function, has both reduced the freezer energy consumption by a wide margin and has alleviateed the pressure that fresh water resources is deficient again, has realized resource make full use of, has reduced the waste of resource.
The above description is only the preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiment, and for those skilled in the art, equivalent modifications and variations made according to the disclosure of the present invention still fall into the protection scope of the present invention.
Claims (2)
1. The LNG cold energy comprehensive utilization system is characterized by comprising: the system comprises an LNG (liquefied natural gas) conveying pipeline (1), a BOG conveying pipeline (2), a secondary refrigerant circulating pump (3), an economizer (4), a refrigeration house (5), a secondary refrigerant inlet pipeline (6), a secondary refrigerant outlet pipeline (7), an evaporator (8), a seawater desalter (9), a seawater inlet pipeline (10), a fresh water outlet pipeline (11), a refrigerator (12) and an LNG vaporization condenser (13);
a cold source inlet of the LNG vaporization condenser (13) is connected with the LNG conveying pipeline (1), a cold source outlet of the LNG vaporization condenser (13) is connected with the BOG conveying pipeline (2), a heat source inlet of the LNG vaporization condenser (13) is connected with a lower end outlet of the refrigerator (12), and a heat source outlet of the LNG vaporization condenser (13) is connected with an inlet of the secondary refrigerant circulating pump (3);
the outlet of the refrigerating medium circulating pump (3) is connected to the inlet of the economizer (4), the lower outlet of the economizer (4) is connected to the cold source inlet of the evaporator (8), and the cold source outlet of the evaporator (8) is connected to the refrigerating medium inlet of the refrigerator (12);
the secondary refrigerant inlet pipeline (6) is arranged in the refrigeration house (5), the outlet end of the secondary refrigerant inlet pipeline (6) is connected to the heat source inlet of the evaporator (8), the heat source outlet of the evaporator (8) is connected with the inlet of the secondary refrigerant outlet pipeline (7), and the outlet of the secondary refrigerant outlet pipeline (7) is connected into the refrigeration house (5);
a cold source inlet of the seawater desalter (9) is connected to the upper left end of the refrigerator (12), a heat source inlet of the seawater desalter (9) is connected with the seawater inlet pipeline (10), a cold source outlet of the seawater desalter (9) is connected to the lower left end of the refrigerator (12), and a heat source outlet of the seawater desalter (9) is connected with the fresh water outlet pipeline (11).
2. LNG cold energy comprehensive utilization system according to claim 1, characterized in that the seawater desalination plant (9) is a WR chilled seawater desalination plant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120029015.6U CN214120492U (en) | 2021-01-07 | 2021-01-07 | LNG cold energy comprehensive utilization system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120029015.6U CN214120492U (en) | 2021-01-07 | 2021-01-07 | LNG cold energy comprehensive utilization system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214120492U true CN214120492U (en) | 2021-09-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120029015.6U Expired - Fee Related CN214120492U (en) | 2021-01-07 | 2021-01-07 | LNG cold energy comprehensive utilization system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214120492U (en) |
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2021
- 2021-01-07 CN CN202120029015.6U patent/CN214120492U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210903 |
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| CF01 | Termination of patent right due to non-payment of annual fee |